Bob, the Pitts flies super with the Taurus 3.2. Got better on each flight. Fourth flight though is when the idle would stick at about 3000 rpm. Could "goose" the throttle and sometimes the idle would return to low. Servo linkage is fine, no binding.
Ran some tests this afternoon to try to find out why the problem. Disconnecting the servo linkage from the throttle and with the cowl off, I would start the engine and manually move the throttle until it stuck on high. I could reach on the front side of carb (engine is inverted and "front" is toward the prop) and finally figured out if I pulled or pushed the butterfly lever where the spring is toward the spring it would compress the spring about 1/32", free up the other side of the linkage where the nylon arm is attached with a set screw and allow the idle to go down to where the engine would almost cut off. Do I need to put a washer or spacer to keep the spring compressed if I don't take it off?
I am chomping at the bit to fly this bird some more, but I will end up with a damaged plane if I keep having this problem.
dp